Partial photocatalytic oxidation of glycerol in TiO2 water suspensions
CATALYSIS TODAY, vol.151, no.1-2, pp.21-28, 2010 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 151 Issue: 1-2
- Publication Date: 2010
- Doi Number: 10.1016/j.cattod.2010.01.022
- Journal Name: CATALYSIS TODAY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.21-28
- Keywords: Glycerol partial oxidation, Selective photocatalytic oxidation, Titanium dioxide, Reaction pathways, LIQUID-PHASE OXIDATION, SELECTIVE OXIDATION, CATALYTIC-OXIDATION, AQUEOUS SUSPENSION, AROMATIC ALCOHOLS, 4-METHOXYBENZYL ALCOHOL, ALDEHYDES, GREEN, COMPLEXES, CHEMISTRY
- Anadolu University Affiliated: No
Abstract
The photo-oxidation of glycerol in aqueous suspensions containing commercial and home-prepared TiO2 samples in the anatase, rutile or anatase-rutile polymorphic phases was investigated by using two different batch photoreactors, an annular photoreactor and a cylindrical photoreactor. The glycerol oxidation products detected in the aqueous phase were: 1,3-dihydroxyacetone, glyceraldehyde, formic acid and carbon dioxide. Two unknown compounds were also detected by electrospray ionization mass spectrometry as peaks at m/z 268 and m/z 176. A plausible mechanism for their formation was suggested based on ESI-MS and MSn experiments. The results indicate that in both systems the commercial samples showed the best performances both for reaction rate and selectivity toward 1,3-dihydroxyacetone, glyceraldehyde, formic acid and CO2. (C) 2010 Elsevier B.V. All rights reserved.